7 screw_dia = 3.5 + 0.75;
8 screw_head_dia = 8.2 + 1.0;
16 d = rod_dia/2 + thick/2;
20 ymax = mainheight+thick/2;
23 circle(r = thick/2, $fn=30);
29 translate([-d, 0]) C();
30 translate([-d,-d]) C();
33 rectfromto([-d,ymin], [e,0]);
34 circle(r= rod_dia/2, $fn=50);
37 for (y= [-d, +mainheight]) {
38 translate([d, y]) C();
39 rectfromto([d, y-thick/2], [e, y+thick/2]);